package util;

import java.util.Random;

public class IdGenerator {

    private static Random RANDOM =new Random();

    private static final char[] characters={
            'a','b','c','d','e','f','g','h','i',
            'j','k','l','m','n','o','p','q','r',
            's','t','u','v','w','x','y','z','0',
            '1','2','3','4','5','6','7','8','9'
    };

    public static String generateId(int length){
        StringBuilder sb=new StringBuilder("CYX_");
        for (int i = 0; i < length; i++) {
            int index=RANDOM.nextInt(characters.length);
            sb.append(characters[index]);
        }
        return sb.toString();
    }
}
